Datasheet

Chapter 1 • The Revit World
10
Instance Properties
The items that you can edit immediately are called parameters, or Instance
Properties. These parameters will change only the object being added to the
model at this time. Also, if you select an item that has already been placed in the
model, the parameters you see immediately in the Instance Properties dialog will
change only that item you have selected. This makes sense — not all items are
built equally in the real world. Figure 1.12 illustrates the Instance Properties of a
typical wall.
Type Properties
The Type Properties (see Figure 1.13), when edited, will alter every item of that
type in the entire model. To access the Type Properties, click the Edit Type but-
ton in the Properties dialog, as Figure 1.14 shows.
FIGURE 1.12 The Instance Properties will change only the currently placed item or the
currently selected item.
At this point, you have two choices. You can either make a new wall type
(leaving this specifi c wall unmodifi ed) by clicking the Duplicate button, or you
can start editing the wall’s Type Properties, as shown in Figure 1.15.
WARNING I cannot stress enough that if you start modifying Type
Properties without duplicating the type, you need to do so in a very deliberate
manner. You can easily affect the model in unintended ways. We will discuss the
specifi cs of all the wall’s Type Properties in Chapter 16, “Advanced Wall Topics.”
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